Intelligent people have more zinc and copper in their hair.
233
Intelligent men tend to be more sexually faithful.
31
People who are more likeable and attractive are generally perceived as more intelligent. This is called the “Halo Effect.”
13
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9
Forty percent of American adults cannot fill out a bank deposit slip correctly.
155
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8